Window sash lock



March 23, 1937. B F. CUNE 2,074,501

WINDOW sAsH Loox Filed oct. 2K3, 1935 F531. Pegg.

INVENTOR: 7 BERT/MM Ecu/vf 2 ATTORNEY.

Patented Mar.. 23, 1937 sTATEs PATENT orties 2 Claims.

This invention relates to window-sash locks, and particularly to a sash lock for double-hung Windows.

'I'he general object of the invention is to provide a window-sash lock, by means of which the sash of a window may be locked closed or open, or partly open in such position as to provide for ventilation, but not sufcient space -for a burglar to crawl through the window into the house, thus providing for ventilation through the window, while preventing the entrance of a burglar therethrough.

Other objects and advantages will appear hereinafter as this specication progresses.

The invention is illustrated in the annexed drawing, which forms a part of this specification, and in which,

Fig. 1 is an inside elevation of a double-hung window with my lock applied to the sash thereof, and showing the sash locked in closed position by my lock.

Fig. 2 is a view like Fig. 1, except that the sash are shown locked partly open by my lock, in such position as will provide ventilation through the window, but not sufficient space for a burglar to crawl through the window.

Fig, 3 is an enlarged iront view of my lock shown in locking position on a window sash, a fragment of the sash being shown in elevation and a fragment of the window frame and lock sockets in said frame being shown in section.

Fig. 4 is an end View of my lock shown on a sash.

Fig. 5 is a rear view of my lock.

Fig. 6 is a front view of my lock, shown in unlocked position with the lock bolt sleeve shown in section.

Fig. '7 is a horizontal section taken on line I-1 of Fig. 3.

Fig. 8 is a transverse vertical section of my lock taken on line 8-8 of Fig. 3.

Fig. 9 is a transverse vertical section of my lock taken on line 9-9 of Fig. 6.

Referring more particularly to the drawing, in which corresponding parts are designated by the same reference characters in all the figures, I designated a double-hung window comprising a frame 2, with a sill 3, a lower sash 4 and an upper sash 5, one side t of said frame being provided with a plurality of vertically spaced openings 'I in its inner side. One of my locks, generally designated lil, is secured on the inside of the lower sash Il, near the upper end of said sash, and another of my locks is secured on the inside of the upper sash 5 near the lower end of said sash.

My lock includes generally a plate II, a slide bolt I2, a spring I3 for said bolt, and a metal sleeve I 4, there being one of said sleeves tted bearing I6, through which the outer end portion of the slide bolt I2 extends. The plate II is also formed with a depression I'I in its front side or face adjacent its inner end, and is provided with a horizontal slot I8 and a vertical slot I9 at the inner end of said horizontal slot, in the rear wall of said depression. On the rear side oi the rear wall of the depression I'I is secured a sleeve bearing 20 in which is slidably tted the inner end portion of the slide bolt I2, into which sleeve bearing lead the slots I8 and IS, said sleeve bearing being notched at its inner end adjacent the rear wall of the depression il to form stops 2| for an arm 22 on the inner end of said slide bolt, which arm is formed on its outer end with a thumb piece 23, and is adapted to extend through the slot I8, when the bolt I2 is in locking position (Figs. 3, 7 and 8) and through the slot i9, when the bolt is in unlocked position (Figs. 6 and 9). The thumb piece 23 is formed with extensions 24, at opposite sides respectively of the arm 22, which extensions extend over the front of the rear wall of the depression I'I, above and below the slot I8, when the bolt I2 is in locking position (Figs. 3, 7 and 9), and said arm 22 is adapted to ,n

engage one of said stops ZI on the sleeve bearing 20, when the bolt I2 is in unlocked position and said arm is swung either up or down within the slot I9 (Figs. 6 and 9). The front edge or surface 25 of the thumb piece 23 may be curved in an arc described from the center of the bolt I2 (Figs. 8 and 9) so that neither extension 24 of the thumb piece 23 will be swung out beyond the front face of the plate II when the other extension is swung into the slot I9 for holding the bolt I2 retracted or in unlocked position (Figs. 6 and 9), thus keeping said -front edge of said thumb piece within the depression i7 and within the front face of the plate lI at all times so that it will not strike against the outside of the lower i sash when the lock is secured on the inside of the upper sash. The bolt I2 is formed with an annular shoulder 26 between its ends and the spring I3 surrounds said bolt between said shoulder and the forward end of the sleeve bearing 2B for projecting the bolt forwardly and its forward end into a sleeve I4 within an opening 'I in one side of the window frame (Figs. 1, 2, 3 and 4). The plate I is provided with openings 27 in the 5 rear wall of the depression I'l to receive screws 28 for securing the lock to the inside of the sash 4 or 5 (Figs. 5, 6 and 3), and the flange I5 of the plate II is provided with openings 29 to receive screws 30 for securing said flange to a side edge of either of said sash (Figs. 8, 9 and 4).

The operation, uses and advantages of my invention are as follows:

When the sash 4 and 5 are closed, as shown in Fig. 1, the arm 22 of the lock on each sash is l5 swung into horizontal position, by applying ones thumb to the arcuate edge 25 of the thumb piece 23, so that said thumb piece is positioned with its extensions 24 outside of the slot I9, whereupon the spring I3, acting against the bolt shoulder 26 and the forward end of bearing 20, projects the forward end of said bolt into a Sleeve I4 within an opening I in the side G'of the window frame 2, the arm 22 sliding forwardly through the slot I8, andsaid sash are thereby a5 locked in closed position. 1

To unlock a sash the thumb is`v applied to the thumb piece 2,3 and the bolt, I2 pushed to theright, as shown in Figs. 3 and 7, untilits forward end is withdrawn froma sleeve I4 in A30 an opening 'I in the window frame,` andthe thumb piece and arm 22 are then 'fswunglup or down, so that one ofthe extensions `24 of the thumb piece projects through the slot I 9, in which position said extension engages the 3'5 left side of said slot, as shown' in Figs. 6 and 9, under the influence of the spring I3, and holds the bolt I2 withdrawn from said sleeve I4.' The sash is now unlocked and may be'opened. When it is desired to lock a sashpartly open o to admit air into a room, but not open sui'iciently to admit a burglar through the window, the sash being open in such position, thethumb is applied to the arcuate edge 25 of 'the ythumb piece 23, and said thumb piece .and arm 22 are swung up or down, until the extensions 24 of the thumb piece are withdrawn from the slot I9, as shown in Fig. 8, in which position of the thumb piece the bolt I2 is projected by the spring I3 into the sleeve I4 in an opening 'I in vthe side 6 of the window frame, as Yshown in Fig. 3, thus locking the sash in a position as shown in Fig. 2 of the drawing. In the open position of the sash, as shown in Fig. 2, it will be observed that the open position of the sash is such that air may be admitted through the window under the lower sash and over the upper sash, but the space between the lower edge of the lower sash and the window sill 3, and the space between the upper edge of the upper sash and the upper member of the window frame are too narrow to admit a burglar through said spaces intoI the house.

My lock is placed on the lower sash high enough above its lower edge to prevent a burglar from reaching through the space between the lower edge of the sash and the window sill 3 and unlocking the lock, while my lock is placed on upper sash low enough below its upper edge to prevent a burglar from reaching through the space between the upper edge of said sash and the upper member of the window frame and unlocking said lock.

'I'he highest point of the arcuate outer edge of the thumb piece 23 rests within the depression I'I and within the front face of the lock plate I, so that the lock on the upper sash will have its thumb piece in such position that it will ,not strike against the lower sash when the sash are moved into overlapping relation. `I claim:

l. A window sash lock comprising a plate formed with a depression therein and a sleevebearing at the rear of said depression opening at its front side into said depression, and said plate being bent at one end to form an end flange, saidk flange being formed with a bearing`v in alignment with said sleeve-bearing, a slide bolt mounted to slide in said sleeve-bearing and through said flange-bearing, and an arm on said boltprojecting through said open side of said4 sleeve bearing into said depression.

2. A window sash lock comprising a. plate formed with a depression therein and a sleevebearing at the rear of said depression opening at its front side into said depression, and said plate being bent at one end to form a flange, said flange being formed with a bearing in` alignment with said sleeve-bearing, a slide bolt mounted to slide through said sleeve-bearing and said flange-bearing, said bolt being formed with.v

a shoulder, a spring surrounding said bolt and bearing at its ends respectively against said shoulder and against one end of said sleevebearing, and an arm on said bolt projecting through the open side of said sleeve-bearing into said depression, said depression being formed with a slot into which said arm is swung when said bolt is retracted against the tension of said spring, so that said arm will engage one side of said slot to hold said bolt retracted and against the expansion of said spring.

BERTRAM F. CLINE. 

